{
  "manageEntity": {
    "action": "Save",
    "entityId": "727475",
    "entityType": "Track",
    "nonce": "0x5793c9f5248fcd5ca13df50eb7101d48e837904f8f82db9d8438011635c37d60",
    "signature": "0xdb2859049a7abffce86e0dc29656cbc2e8460fdafd83235c9ebb885fd5d7ef405b172fae638886e315bd6f118b65458db1a97bf1ab8c8d82094c7a9b580336fe1b",
    "signer": "0x5e2Df934ce085A318EAf59eDEa17140cd6460f21",
    "userId": "908298266"
  }
}