{
  "manageEntity": {
    "action": "Save",
    "entityId": "186707",
    "entityType": "Track",
    "nonce": "0x2c1a5724dbd7685aacd26edc7f0f7fdce2fd8ee13cca1d60adda6b5e01b93bd1",
    "signature": "0x945e49eded77cd6e40b32d186beca26b3970525ec9568b695a69dcf5821457423ddc14040aa1d5a2c53d608ac563bbabc9e96e385c141ea74e91aa3e3baf74851c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}