{
  "manageEntity": {
    "action": "Save",
    "entityId": "1917094378",
    "entityType": "Track",
    "nonce": "0x2e04fba5b2ecf38cbcfb8d786a0f3302ebaafe74ea592fe76d84de7d72a059ad",
    "signature": "0x182d0c6e7f64d71f97accccedba8823d9df719838315c0fdd781e8cad7375e901662a1c01ecedd77ab900bf5a19e70060ecbf5bd31cdea886a968b77e707ce161b",
    "signer": "0xBBBE9eFc177a4E708d317195Fa81aA6E8E2F7E92",
    "userId": "557135181"
  }
}