{
  "manageEntity": {
    "action": "Save",
    "entityId": "5152447",
    "entityType": "Track",
    "nonce": "0xf68499babd795174d5431424382460a458cab12b1a555b01489cbe9ba3e3f970",
    "signature": "0x05b4a163febda5e95c1785b1505d7e431037c2c25b6df7e95112f59092ea55b4339091b1e631d8efef34fc43d352ebf350b6f91bc008547ffc6c3f0c7a807e2d1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}