{
  "manageEntity": {
    "action": "Save",
    "entityId": "700382217",
    "entityType": "Track",
    "nonce": "0xb5dc9e283bc75679cd210a40526efcc6b4bdb17eea93b1834db3ed013836abba",
    "signature": "0x80afb69e113db2e276904dd1a1f8b749c96c000636eaada30201c392e81e557739f280da01da9dbea74ac9a21712b9de634a86c9bdbca2efc90de7825343a0801c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}