{
  "manageEntity": {
    "action": "Save",
    "entityId": "1808574336",
    "entityType": "Track",
    "nonce": "0x007f9447c4dc87f18c1390acf88b528ad45ea01ec3888f755d89031c3bf0145e",
    "signature": "0x55b975f22694a2196d74a4271e8bd89d71bf955a2599697e9735e6f31d5144b81d9ee7576d56f33cdf3846ae8a9931bd5f11967eec9701cd3254a6ed712d99231b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}