{
  "manageEntity": {
    "action": "Save",
    "entityId": "974968106",
    "entityType": "Track",
    "nonce": "0x3d4bc5b01d4eb13d84575e6b6f4999c8de65471982c24db610a3e7f001f10571",
    "signature": "0x1b542607f61c15ecb426c500e0a1f877fad7479db054e89325c11a97408a0881047be84ceb7dc16e7da8a57b199e068a4de4eb593c682a62cb587991ed97ed5d1c",
    "signer": "0x58EeE406DB0683Db4101A97aee427Da7951e499d",
    "userId": "147070911"
  }
}