{
  "manageEntity": {
    "action": "Save",
    "entityId": "51561168",
    "entityType": "Track",
    "nonce": "0xd70fd5d59c7fc0928ab7d6ea0de83d4a7147a5eed693192362c4dea30e12f2ab",
    "signature": "0x6f2f1b7267a8935d36df48fe4be1d86af24f7626dbb5554814607ab3e2c04c6c09aa92dd5b8404cc5a81a28e978e263635ef3bc31914c5b6b28c1ea9f1a658df1c",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}