{
  "manageEntity": {
    "action": "Save",
    "entityId": "1941278534",
    "entityType": "Track",
    "nonce": "0xcb1e396db25020203fafed01ee2fcf6792d15d6e90d38e52ffa8f06ae59d5f6f",
    "signature": "0x509c3a75a31cdea2db728636cfc557cdf021ead917ea3f90a6dff64b7da9384545fc16891bb459c8c6fef53ab5b3cb9539ddaf15df2f44855b78efdf296e0bc11c",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}