{
  "manageEntity": {
    "action": "Save",
    "entityId": "1448134296",
    "entityType": "Track",
    "nonce": "0x274e8aaf57b95873dc02d0296746eedafd12e1181619ee4d2a339bcb5d76cda7",
    "signature": "0xf7f2c52c9a1b6eaa7f25910590b46191f60a651fb8904ce195ec1c38c41e01f15612f026b7c982dd4af738c4319777bc4790f0eab4b5a499786ecc70d658b0fe1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}