{
  "manageEntity": {
    "action": "Save",
    "entityId": "436139881",
    "entityType": "Track",
    "nonce": "0x6536c3063940155d5621d95785fa1bb53854776073ed14fb50870ace1a1be668",
    "signature": "0x9253cfc3a422bfe8f3ec47192f7dabb39401d45a1f4811af083e9fb3b35af3f46e026c328774188021353f3669e368cc847c39a6f8b8392a0714cd627c0dd6741b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}