{
  "manageEntity": {
    "action": "Save",
    "entityId": "1220370775",
    "entityType": "Track",
    "nonce": "0x0f50b52f6be7cd21a04a17e4b2ff4202d6c8acb38f9119c49fcf7cb46149dd63",
    "signature": "0x150baf297d80bd1e159882940409a27b3c43ee196393d6c76b61b18edd55daea3ad11848d44d2cb421675d144b636ed58a899705bf62bb1a1c159138a177990b1c",
    "signer": "0x7Cd44Dc53B13eEA7335A000Ce36c05cDFE34b348",
    "userId": "355113"
  }
}