{
  "manageEntity": {
    "action": "Save",
    "entityId": "1740579198",
    "entityType": "Track",
    "nonce": "0x4cb6cc45c5f637744008cf7a6131286b2b638e24749064ac2f2390fbb9effae2",
    "signature": "0x876d4a543e7743ac771febd254d15142c76cc33e292192896a6699f90c1af4ea17a1aeaa7bced1c701b38a5ec85ba987eb017f3043d851fc51611166c240e1731b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}