{
  "manageEntity": {
    "action": "Save",
    "entityId": "184830739",
    "entityType": "Track",
    "nonce": "0x7d7fb726f3ad445c5215a9e15cbdf81876a09f0714e397dde134cfe6eb334ea7",
    "signature": "0xcdd79cb12c7e58cd7653afb68ddff74b00291a50307f85fd4b6fc776ad1906d41bebf99961481a6af2c7cf9266947762f0139b860d0031560dc5b836bc2c36b81c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}