{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896686379",
    "entityType": "Track",
    "nonce": "0xb28aecd43494e3a276b820bfabfc02657f5f36985a851fd9ecbd7f38d3974dc7",
    "signature": "0x401a8c63c28f11ce0bbc9943e5df9bd4e7017ddd1bc808067f1adff06778d28e526e9e0182debad1d8e80fce2e7836e10802ebaeac5dcbcb11ea744d24fb44661b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}