{
  "manageEntity": {
    "action": "Save",
    "entityId": "2027648494",
    "entityType": "Track",
    "nonce": "0x74d003d71c586232d340c7d481a2da846cf5e8bb94bdb5583599282d41d0df06",
    "signature": "0xc564aa1c0018132ff0d1b4f4382a6c9fdf15ad7ad89ba64c97de2064977490a27c7f8af53d9b116b9f1af30622c5a806f05d75ddac4c43c0e1030ad435c2682a1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}