{
  "manageEntity": {
    "action": "Save",
    "entityId": "692056845",
    "entityType": "Track",
    "nonce": "0x72e94410eff5067147deda15bed16da31c7773bbb9959944339533aab1121b41",
    "signature": "0x73f664da7c26fa16ead0ec8546021a59cf165744cadb3151e6908732cd357a033d11fd82ac55d7acdd0dfef2fc74d73a7c4811df16932e83289567540a0dab1b1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}