{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120469883",
    "entityType": "Track",
    "nonce": "0xf3da015b21824218132735506b0537426ac0bc9077560a83ba7fc4cb4deb0137",
    "signature": "0x085a1fa268234bfcb2a6c1932062ea16e33d2a2355b484923933895e633ad61c010c938b139c89e7fa080594b8d9f657eea3bb3daa50fe934386358a22c07c471c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}