{
  "manageEntity": {
    "action": "Save",
    "entityId": "482907",
    "entityType": "Track",
    "nonce": "0xad087454b6868c40b00bea49f0fd5bb1580a241ab1989e12a7c1f5a0bb2a8862",
    "signature": "0x6a5536364a4c5a0586abd190d40c7333654718654c06e34174951d003621c2e85fbc663266472435d5cb981e2e8f5d2a614bf4a723b8d52c049ccd0322107eb91b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}