{
  "manageEntity": {
    "action": "Save",
    "entityId": "899192169",
    "entityType": "Track",
    "nonce": "0x63e66b192a3a01b54db6311d82c85d1efcbb91e477ddfd2a35708ce993024c64",
    "signature": "0xfe0b732c6551f1c64190d1c8a1d46997f5e578aaddb807f546fb10395549de9e2203c59dc16bf6564024c2e9f2a944a3e481f3ea6d9490676d2ea89d20a69eb51b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}