{
  "manageEntity": {
    "action": "Save",
    "entityId": "1808860049",
    "entityType": "Track",
    "nonce": "0xd2f6745520e528e826dd87b7d17288a5a98cc2db24162ce7f2459728aef2998e",
    "signature": "0x351874358581917d3795d2093706f77d2094fb7bc4be2662c38e795158e7d9a0668948b642ccb192a9a1b64cbaeebcc2bd48d786c22f1a21fb424315d331f27b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}