{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429585929",
    "entityType": "Track",
    "nonce": "0xfd0bc1e503992eb5f3d2e2ce3d6b09d8c7dba4519c9fac707bcae6631ee9d40a",
    "signature": "0xb3e63a5209997fa0c30d37a8c27a06f7bcd161cd30c79a6bc9b8812425ac8e323d7522585d5daa76d9197c26d53f00086bc9b01a143d9f58b85e65f7ae642bd21b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}