{
  "manageEntity": {
    "action": "Save",
    "entityId": "671789225",
    "entityType": "Track",
    "nonce": "0x6071f5fd2aa078a91c18b86241e78fcba510c69597453b900321ca9acc7dd139",
    "signature": "0x0dfb304d032e7168de9c68036a778aaca4e3925cd97706804400106a0ed455dc476eb7809afbf66bdca51a0aeaeb639721f83eec3f90443f650b4f31fc4234f31c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}