{
  "manageEntity": {
    "action": "Save",
    "entityId": "1017534214",
    "entityType": "Track",
    "nonce": "0x121d4f56155b52bbbaee54242367c7837f0c59a55bfff95e1ed90317d39fbb9e",
    "signature": "0x4be978a6e6317baa9fdc0fe674b10ef8bb722b3df93112bd8ae2b707d60c730659dde0044e7a6822d34d44b0d30fd2b0050c5984a7d6ccb9ff56bcd632e22d671c",
    "signer": "0x8efe8c82bCa7362435ebe196046D5A864eE785df",
    "userId": "906663740"
  }
}