{
  "manageEntity": {
    "action": "Save",
    "entityId": "919055",
    "entityType": "Track",
    "nonce": "0x78d773d7df07709b2dba1d4966431f117d0c179038560cc39b42f58f19b53547",
    "signature": "0x7c6e2b2d99a75234d66665ec7855b2f940737c43d43557a1d47bb8132aad3a350f1bc38d54d3afd243c32e672ddbd994b707092f645cc8da67d9fb7fa9024f6a1c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}