{
  "manageEntity": {
    "action": "Save",
    "entityId": "2021234345",
    "entityType": "Track",
    "nonce": "0xb7e9d7f4773f0f43f0548164bbe7f9be915de86c4300a1b5876ac4bdb7185de8",
    "signature": "0x4e521d4d09b2ff652bb1c2f15c4ac1bcff79c63302f206f14a6006f96399ab7c5b5be33f1735dd456bed2dc9ae2525201211e5cbf96ebc72908410b0ee1a7dfe1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}