{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045654142",
    "entityType": "Track",
    "nonce": "0xa618c5e32b15aba082e43be9da537a44bc5c6d66a91eb8d1a86104fa64ff9d97",
    "signature": "0x4fbcd0e8d5a30a7b9df6901152f8817227304f820382b8b83e553c510621e06068198dc14b68b9eff7912aa08624d0b5358b5024a59e8a01a2c45445f35f7af81b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}