{
  "manageEntity": {
    "action": "Save",
    "entityId": "592103872",
    "entityType": "Track",
    "nonce": "0x5755663077fa242c420521860735340cc2725cb2f6491a9ed54766753d60d432",
    "signature": "0xf1458c33e6cae29b90a1ab7a9de7bcf3141bb7467004d078cd344fa696b54e685b0ac350e1a86c45ad97dafa4ae7d83ec04e26cbafff6b12ee26e8fe73f3b2061c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}