{
  "manageEntity": {
    "action": "Save",
    "entityId": "983682985",
    "entityType": "Track",
    "nonce": "0x77954ba7c78893a92d23cae74e7b96e47ed059b665aaf2d1a357dbd532d23b15",
    "signature": "0x56d2d7a7459e35c4771730c76dd4e007061910a72a25d9878f6b0d60fe8462b00892c2ded0d654350ec5f80fd7fe8703f80b3cfc453a7bd69b2145c2840fd11b1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}