{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118445386",
    "entityType": "Track",
    "nonce": "0x361f086156c7fdc337561676ea1cc033fa6bd6ce65e6295c412f03558b4adada",
    "signature": "0x86e6a1ae5e0e3cb32aefacd71d71a4aeb4985e709fdb09a27d2596ff13da9ad42027a3f7c332474bb2ee86048ea2ae16d40ebf4e5f263187fd6fedbcfa65804d1c",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}