{
  "manageEntity": {
    "action": "Save",
    "entityId": "2122426331",
    "entityType": "Track",
    "nonce": "0x1bf8257d62d5948cd9264017c2e5b91f77959695794e54b18a7aa9ccec60b52d",
    "signature": "0x66db90be9b3ad470f2406da2e39f96d32f0769b5d1d4502abec19ade8c8b50f44234c2566b02b2c48ebbe4d324363877f13692c969bf7b13dd0ef60b0406a6041b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}