{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142787428",
    "entityType": "Track",
    "nonce": "0x698be5627402c1abbbd48136b89e6fc9567e3e22a6366c9fb147cd4ff397af53",
    "signature": "0x58ed01279cc66bde92f946fd82a14c60ed7a08932fb72e6c3dd76746a718465a57f03114534409af9a36464664cdfcf38b9c450d6775d6a0c0ed60cc5dd6d2a61c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}