{
  "manageEntity": {
    "action": "Save",
    "entityId": "389118869",
    "entityType": "Track",
    "nonce": "0x584bcc1899605dd89827d7c2de161414a39f06842dbf066a532710d324cc5002",
    "signature": "0xcceec42a5dd7ff97286072b2d23337c8279b09022384bdd652cbf13967fb19781c823ba0687ce5ee704f95eeef2cd48dd7f3bac0231078bb448907409cc8508c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}