{
  "manageEntity": {
    "action": "Save",
    "entityId": "366465952",
    "entityType": "Track",
    "nonce": "0x6498857bf254d60775ecab291a82bf39fe475db85848a3472fc49587a6debd82",
    "signature": "0x6e74e63432c41b024f633a5b1624ffb72eba00f17495a52e12ba2e5fdef4331216daac1f6336bcd68fa14c0b40c91d5a18be62a612ac921859ff39c604a2cd561b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}