{
  "manageEntity": {
    "action": "Save",
    "entityId": "1361218840",
    "entityType": "Track",
    "nonce": "0x3275453ca64588513d8f26b8ca0908d803e82a92ec2e9f529db6ae675ade5527",
    "signature": "0x5866269d44f970c30a7a08b30602a16aa41b00e803f68af058621df381ab536a2960e59f0be25ce02b25ebb0859332b8ecd046f1a0a3daddb49ab5a99e98aa481c",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}