{
  "manageEntity": {
    "action": "Save",
    "entityId": "601449700",
    "entityType": "Track",
    "nonce": "0xc97befcd6e547bc70f94578643be86eccaf148aa15bc7f046505c7190319b746",
    "signature": "0x70ee4a18c0ec8389a5414393cf21519281c39cc3aaf4d48a4ff7fc7464702fdd52d376cdc3a54e94dba34aeffc031c3e8f7bee8232cbd509d3f851239642c8841b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}