{
  "manageEntity": {
    "action": "Save",
    "entityId": "1387794692",
    "entityType": "Track",
    "nonce": "0xe4760d77f29e32640f53ae9d72fdcf015d9640b8938a2145f3efc15ddc39d536",
    "signature": "0x98dfd10e8468b96ab23471ac0d1ecb97767c05d690a54f0dd62db7123d978af139db831f0f7788b411e576dff31b864b0c4f3cd6833a0ff7c7215847fd0d11ea1b",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}