{
  "manageEntity": {
    "action": "Save",
    "entityId": "913326716",
    "entityType": "Track",
    "nonce": "0x218e0ed225acd05ba7793061ae762610bab25ce7744d6e9598527e727b92e5ed",
    "signature": "0xb17537eed46163e0c9cf0abd66776590f3ba641d24f085dabafd3d061698eec9081bf7102b22d7179429f9bf797355152d31d38cf6c67e0b5b6988c2eeddf1d51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}