{
  "manageEntity": {
    "action": "Save",
    "entityId": "63454627",
    "entityType": "Track",
    "nonce": "0x0a12a94551dd7359b1a19897f42ebac43925155d367ecbf9fa5bde1ca1d0f77e",
    "signature": "0xafd5e44a92595a77cbd330f27d731a133bdd32d226712f91b93d1ee394e548e256120a39ab4b8432edeedf1e555998b5e66784315e1cae60de48523f949d8ba61c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}