{
  "manageEntity": {
    "action": "Save",
    "entityId": "36820598",
    "entityType": "Track",
    "nonce": "0x9884af386735aff81d02a1c84efc28880650aaf64ebf9bcbf13615221e41a419",
    "signature": "0x943cc8714c3a31973bd043e5e91c5b3dc97a5ee2e16723e2dc6a5e3047bbe3b94f21791c45138557c7d8adc2174e06e81f824880aba3e0de7a579d2e844295761b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}