{
  "manageEntity": {
    "action": "Save",
    "entityId": "2001613160",
    "entityType": "Track",
    "nonce": "0x50b9f47e2433ba99d74b81afa0f20f600fa134f4d4bc75ec2141fc3ef7b14a37",
    "signature": "0x3539b2a430fb4a07d73ebc19089052a3ec1c8ee0917e7bb4d103e7448025b2e9499af5aeab884b4a76725f945b0dde31c1e6d9e63031ff1de887e70c93029ba01b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}