{
  "manageEntity": {
    "action": "Save",
    "entityId": "1374686962",
    "entityType": "Track",
    "nonce": "0xf57b7d0497fd6ef916c81b63426610d64959e9821f934b38643973fd9e660354",
    "signature": "0xe1dc4f3634b0f1069e6a5040d8da53ef49512b24bff8e61f859d37a1c8abde145f4651b6ac3f2d07a2c236b74c5d6c21c6eab43a2e65662b0b54fa775c2e54f01c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}