{
  "manageEntity": {
    "action": "Save",
    "entityId": "330201",
    "entityType": "Track",
    "nonce": "0x460b5d1e10bc339ecc371e8864c3c17361c59250cee242d4a0b618a7a24d1b56",
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    "signer": "0x5D4848bCf5c4abA1a0Fdf2B61408c9e4288aDb0E",
    "userId": "305415280"
  }
}