{
  "manageEntity": {
    "action": "Save",
    "entityId": "1218094994",
    "entityType": "Track",
    "nonce": "0xba0e1d3b2dd38fc0e5f500a10982e34cc1e116c424afa669045a520819adf0fb",
    "signature": "0x2e5281b50ad43fc15981bad1251101e6c84cff0a1bb9138f1af04a338f90606d50813ea642cd7f9f30619f98b666a609760fa75a609a3cf95d5eaddd303594501c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}