{
  "manageEntity": {
    "action": "Save",
    "entityId": "1727780235",
    "entityType": "Track",
    "nonce": "0x524638eb1b912265e360d67ea90eeb7c8fc63e2afbba6beff4d403b2f5c11e76",
    "signature": "0xbeba52d78f163d3e4b37d2e0b0ef8e4cde24c12d4653646067980ec5b170bfaf075f50987e2089480829ecd0aabc1fbaae04f4d0935588ea32e553fa09422d5b1c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}