{
  "manageEntity": {
    "action": "Save",
    "entityId": "423410814",
    "entityType": "Track",
    "nonce": "0xed0793f2b5b4ae50cdb3b1f35598f9fc067621b54190b468f3f1ab7def761ae5",
    "signature": "0x8bfa58d5a1ae96cf8fb3fe448234b352c946f4c2572d866e0fe59fafb37b7d0b05247e596272b6dad79c374dfeaf70fbdb4d838e9aae1c58bc1e2b94f4bbcf791b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}