{
  "manageEntity": {
    "action": "Save",
    "entityId": "1312088818",
    "entityType": "Track",
    "nonce": "0x1abee6f83136f329aa4d4ca5d0b0b721518c940c1757387e4d6380743bd3361f",
    "signature": "0x5de50609b66f21962d388ce6f2a74bdd2fc6e04b0c7205545b212537e9df7bfa319590f87524a7ebcd906237091bb4db97a5e885b0e63ec92c49aa3d70de09e51c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}