{
  "manageEntity": {
    "action": "Save",
    "entityId": "293879124",
    "entityType": "Track",
    "nonce": "0x896c63d174855d2e1414bcbea0078029ef0becbdb682e2a52d7de23ed0962cd2",
    "signature": "0xc407020e47a5d68b4e3bbd5d963e1a0ced193e6a8e59b55f1d55aacf42de7dcd70fcad22638bf9fe4028b5621ce812a2533c4839a48efd1ee91772484b85e6e21b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}