{
  "manageEntity": {
    "action": "Save",
    "entityId": "427376185",
    "entityType": "Track",
    "nonce": "0x5aac1abac214b9dfe4f7b25efbd4f1797c655baa33dedac2e0a52c1b2b85ca5b",
    "signature": "0x8cd11c35d99b74c19bd9ba05cba91159310f5e0cbffc1d8fab220afd54ca7f8c23a67ec4a2fddcd6782f8cc48eae779f1dbb5e587f246f2a843c1f1188e3dfd71b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}