{
  "manageEntity": {
    "action": "Save",
    "entityId": "369738587",
    "entityType": "Track",
    "nonce": "0x96f80e545ec76d3328934adba2e87af2e9abad6f3a985b179c3eb74015440917",
    "signature": "0xca813ca074fd9a005b8581ffa376a69a4922856d2041f0069054cb29ae2cd761063810f82ca4d4b427c655a8409e0ecc150c0e241d673580411bfdcb5cd7db591b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}