{
  "manageEntity": {
    "action": "Save",
    "entityId": "22450579",
    "entityType": "Track",
    "nonce": "0x659987a2b78d3c10a7fbf3109ec11cbdb8ee20a2a407070a19fc000ad0f914c8",
    "signature": "0x1f637ce5d33ea06dcb5e5f05b515a67307c627a01c276552b2600d6e87017c6c71afdc0132b0b647652b4903f16212d5860f59ecba77c9e444f9da815ef2af711b",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}