{
  "manageEntity": {
    "action": "Save",
    "entityId": "980544071",
    "entityType": "Track",
    "nonce": "0x70d1eff5086807f68319144046dacc7e73ebad81661a9753e67e613246fe03b0",
    "signature": "0x190d14ec5a2224279ec01c6ba05c86fcc86c77c98f4fadb2e3c31660efe2c5cb12d42a6d3a6d536b7cd2bb3ea569b148c6e21cc47403d200d6703c7a9b0326ae1c",
    "signer": "0x14d7618B82Da4e7176FDe32e4379943eCd69798D",
    "userId": "238125623"
  }
}