{
  "manageEntity": {
    "action": "Save",
    "entityId": "1186138672",
    "entityType": "Track",
    "nonce": "0x94f48d2db295e01a538e34448b9910b2bbd7eed79a4b0d6e58cbde42d953fe53",
    "signature": "0x0b5c123ff391504f4f3dcf2e47e40b7e15c5fb741d8e563868e363ece44e438012061763ef8cec68a7d16f9caf0e1baa976be740250cfe2980f07cbbe3f9b8111b",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}