{
  "manageEntity": {
    "action": "Save",
    "entityId": "699088307",
    "entityType": "Track",
    "nonce": "0x56287f88e9a45b12a2b64d9e2245edf2eba79221861effa0a017ff4086fce1a3",
    "signature": "0xd8b9377cfb72fb291fa64ee3f5a65ae6bf8f0b480e0f440f04639d7cedafd3d3508c937958d97d5768f0943f38a12182675479dcac189b40e63f0ffdd341644c1c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}