{
  "manageEntity": {
    "action": "Save",
    "entityId": "1254790175",
    "entityType": "Track",
    "nonce": "0x1d213992ed76dece0d99fa557ecde1e4dec1700bb37107aa7bc250b172ae7484",
    "signature": "0x06fcba91d890aa33f59f21894d6509e53c9f98c044637cb97cc1791b2ec837a80905939fa29b26990347fa218651f78648a1445a28c17c573f9e50fa589ac63a1c",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}